50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
// Copyright 2019 Drone IO, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package pubsub
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/drone/drone/core"
|
|
)
|
|
|
|
type subscriber struct {
|
|
sync.Mutex
|
|
|
|
handler chan *core.Message
|
|
quit chan struct{}
|
|
done bool
|
|
}
|
|
|
|
func (s *subscriber) publish(event *core.Message) {
|
|
select {
|
|
case <-s.quit:
|
|
case s.handler <- event:
|
|
default:
|
|
// events are sent on a buffered channel. If there
|
|
// is a slow consumer that is not processing events,
|
|
// the buffered channel will fill and newer messages
|
|
// are ignored.
|
|
}
|
|
}
|
|
|
|
func (s *subscriber) close() {
|
|
s.Lock()
|
|
if s.done == false {
|
|
close(s.quit)
|
|
s.done = true
|
|
}
|
|
s.Unlock()
|
|
}
|